Working principle:
These are self-priming centrifugal pumps, self-priming is achieved
using an ejector housed in the pump body. The total delivery
produced by the closed centrifugal impeller is sent only partly to the
pump body. The remaining water is re-circulated through the ejector,
which is connected to the suction chamber and generates the
necessary vacuum to self-prime the pump. When starting the pump,
fill the pump body with water, (without bothering to fill the suction
piping and eliminate air pockets). When the pump is started up, the
water in the pump body circulates through the ejector and transfers
air from the suction to the delivery chamber, expels it through the
delivery piping. At the same time, the vacuum generated causes
water to rise in the suction piping, thus self-primes the pump. Since
the self-priming system operates continuously, these pumps are
practically unaffected even by the presence of large amounts of
entrained air in the fluid being pumped. This series, produced based
on our TAIFU experience, is designed with particular attention to
hydraulic efficiency and choice of materials, which results compact
and quiet pumps of high performance.

Application:
These pumps are suitable for pumping clean water and fluids which
are not chemically aggressive to the pump components. They are
extremely reliable, economical and easy to use, particularly suitable
for domestic applications, such as the automatic distribution of water
from small and medium-sized surge tanks and watering gardens.